Try square



May 27, I1924.

E. N. HARRISON TRY SQUARE 2 Sheets-Sheet l Filed dan. 23, 1922 mwN.

1L/v. mrwonj INVENTOR;

A TTORNEY;

May. 27, 1924.

E. N. HARRISON TRY SQUARE Filed Jan. 23, 19.22 2 Sheets-Sheet 2 rigs/177 1 INVENTOR.

lE. N Har W.. m T T. A

Patented May 27, 1924.

UNITED STATES..

amener N. I-Llmnisolir,r oF EnwI-N; TENNESSEE.

TRY sQUAnE".

Appnatiqn elf-,za January A23, 1922. serial Nd; $341,176;

To all whmn t may concern:

Be it known that l, ELBERT N. lrliminsvori,fl

a citizen of the `United States, residing at Erwin, in the county of Unico-i'4 and State- 6 of Tennessee, have invented; certain new and useful Improvements in rlrry Squares, of which the following 1s a spef'nfication.`

This invention has referenbe totry squares and` its object is to provide'v a carpent'ers 10 instrument for use in connection with-build@ ingY operations and more 'parti"cular-ly"withI reference to framingY wooden buildings.y

In accordance with the invention,v there provided a right angular blade 'carrying-botli` 16 members of the blade which'are longitudinally slotted and provided with handle 'mem'- bers 'attached to the right angular members by means of thumb screws whereby the lian'- dle members may be adjusted longitudinally 20 of the slots.

The bladesmaking' up the square are providedwith gradations representing various! pitches to whichl timbersj'used inthe framingy arel to be acuti* F urthermo'reb handleVv members are provided whereby-the` timbersl may be marked olf'to guide a carpenter in sawing the timbers into the d'esi'red shape;

and various pencil gages are* provided"toz assistv the workmen inl th of the timbers, andV otherfguides arefprovided to assist the workmen.

The invention will be best understoodfrom aconsideration of the folloyvingVv de'- tailed description taken in connection 'with' the accompanying drawings for'n'iingy part'of the specification, with vthe understanding Fig. 2 a plan view of the try square,`

on-the opposite face from that shown in Fig. 1.

3 is a detail of the structure hidden inFig. 1.

Fig'.y 41 is a, longitudinal section of onev of the handle structures. y

Fig. e is a plan View of the structurel used as a gage for boring sash pulleys.

Fig. v6 isa plan view showing the arrangee proper laying entf ment ofthe parts forlaying olf timbers other than the/*arrangementshown 'in the other viewsf l Referring: to thel dr'awingsl there is shown aj angular ltryv square 1, which, as isl customary5-isof thin sheet metal with' a; long'blade 2' and a'short blade 3, formed integrally with the long blade and extending at-ri tangles from"one'u end. The Vblade or mein r2 ligas'ai'1'1 intermediately located cenoral slot extending from af point near ythe center o-ffthfabl'adeto"and around the angle l andalongfthe blade the slot being wide' enough to-j accommodate the 'stem' 5 of av thumb? 6; carried? yby a split handle member-f7, having a bearing 8 at one end in the; handle-Tand a nut bearing 9' at the other'sideiin thehandle 7 such handle being usually-"constructed of wood and indicated at 10.,v The thumb screw 6 with its stem 5 andthe; nutlprovi-demeans for clamping the handle2A 7 in adjusted position on the blade Y The onter end'of the blade 351s cut off at i an angle indicated, at 11 to determine certain; anglesof in building construction. To proteetftlie youter end of the' handle 10 andaals'ofof other handle structures used in connection? with' thel square, metal plates 12 are embedded in the outer end of theC handlel ahdheldthereto a" rivet 13".' s

To facilitate the markingv off of timbers. the blade ofthe gage is prcwided'v with a' regular series" of through slotsV between the slot l11a-nid its inner edge" 14 which maybe spaced; at regular intervals to permit the passage of a: pencil-'point' and therefore constitute' a 'pencil gag/e', 4

Thesaine blade 3" is'v provided with aV keyhole sl'ot 15V and-with Va perforation lifor marking-011 therelative vpositions of the keypollil slot andV knob spindle for a mortise yLaid oil'V onthe` arm 2'. ofthe square on onefface thereof, are numerous lines 17 18 and 19, showing common rafter pitches, and hip-andy valleypitches for roofs and'side cuts for acks' of any pitch.

About midway of the length of the'longer bla-de' Q'of the; try square and projecting at right angles from the Y,edge thereof remote from the arm 3, is wright angularly extendingbla'de 20'si1nilar to the arms2 and 3. The' blade 2O isafshort'blade withfa central longitudinal-slot 21, the inner edge of which does not extend into the blade 2, but terminates on a line with its outer edge, and is useful in cutting two by four inch timbers.

The outer or free end of the blade 2Oy is bevelled oli' at an angle 22 determining the window sill slope.

The blade 2 has a second longitudinal slot 2a therein, which begins at a point near the outer end and terminates before reaching the end of the slot 4, at a point in line with the near edge of the blade 20.

At the end of the blade 2 remote from the blade 3 there is located a handle 23 clamped in place by a thumb screw 24 similar to the thumb screw 6 and capable of engaging in the blade 2. Each of the thumb screws 6 and 24 bind the handles 7 and 23 firmly to the blades of the try square in'any one of the various adjusted positions. These thumb screws are made to engage the handles with a snug lit and the handles may be adjusted along the intermediate slots 2EL in the blade in various angular relations thereto, and one of the handles may be applied to the angular extension 2O of the blade 2.

One long edge of the handle 23 has a bevelled portion 25 with gradations 26 to facilitate the reading of such gradations.

The outer end of the blade 2 on one face thereof is furnished with a protractor scale 27 and at the center of said scale,l the blade 2 is furnished with a perforation 28. The purpose of the scale 27 is to facilitate the reading of the angles at which the handle 23 is set.

Adjacent the scale 27, in the longitudinal centerof the blade, are perforations 29, providing a gage for use when cutting an opening in a window frame for the insertion of a sash pulley.

The operation is as follows The end of the blade 2 is placed against the under side of the top of the window frame and in the groove in which the sash travels, a pencil mark is then made on the frame thru the upper end of the slot 2? and another thru one of the holes 29, according to the size pulley to be used, from the end of the slot to the first hole, if a small pulley is toV be used, or from the end of the slot to the second hole if a medium sized one is to be used and so on. These points Vare then used as centers for the bit when cutting the slot. In using this gage the distance from the top of the frame down to the top `of the pulley slot is accurately measured upon both sides.

Hexagon, Octagon and other cuts are indi' cated on the blade 3 by appropriatellines 30 What is claimed is l. A square of the character described comprising, a long blade, a short/blade integral therewith andA extending atV right right angles to said long blade at a pointin-` termediate its ends and in a direction opposite to said rst mentioned short blade, said long blade being provided with a pair of central longitudinal slots and each of said short blades being provided with a central longitudinal slot, the slot in the short blade adjacent the end of the long blade merging into one of the slots in said long blade.

2. A square of the character described comprising, a long blade, a short bla-de integral therewith and extending at right an gles from one end thereof, a second short blade integral with and extending at right angles to said long blade at a point intermediate its ends and in a direction opposite to said first mentioned short bla-de, said long blade being provided with a pair of central longitudinal slots and each of said short blades being provided with a central longi- .tudinal slot, the slot in the short blade adjacent the end of the long blade merging into one of the slots in said long blade, and means common to either of said blades adapted to be adjusted thereon at any -desired angle with respect to the blade, rand constituting a Vhandle member.

3. A square of the character described angles to said long blade at a point intermediate its ends and in a direction opposite to said first mentioned short blade, said long blade being provided with a pair of central longitudinal slots and each of'said short blades being provided with a central longitudinal slot, the slot in the short blade adjacent the end of the long blade merging into one of the slots in said long blade, said long blade further provi-ded with spaced apertures positioned between'the terminus of one of said slots and the free end of said blade, said apertures associated with said slot constituting a gage for cutting pulley openings of varying sizes.

4. A square of the character described comprising, a long blade, a short blade integral therewith and'extending at right angles from one end thereof, anda second short blade integral with and extending at right angles to said long blade at a point intermediate its ends and in a direction opposite to said lirst mentioned short blade, said long blade being provided with a pair of central longitudinal slots and each of said short blades Abeing provided with a central longitudinal slot, the slot in the short blade adjacent the end of the long rblade merging into one of the slots in said long blade, and means common to either of said blades adapted to bea-djusted thereon at any desired angle with respect to the blade, and constituting a handle member, said long blade further Vhaving marked thereon various scales cooperating with said handle member forY determining various degrees of rafter pitch.

5. A square of the character described comprising, a long blade, a short blade integral therewith and extending at right angles from one end thereof, a second short blade integral with and extending at right angles to said long blade at a point intermediate its ends and in a directlon opposite to said rst mentioned short blade, said long blade being provided with a pair of central longitudinal slots and each of said short blades being provided with a central 15 longitudinal slot, the slot in the short blade adjacent the end of the long blade merging into one of the slots in said long blade,

means common to either of said bladesV adapted to be adjusted thereon at any desired angle with respect to the blade, and constituting a handle member, said handle member being formed of two parts between which the blades are adapted to be moved,V

ELBERT N. HARRISON. 

